Stuffing box



E. WILSON Nov. 12, 1929.-

STUFFING BOX Filed Aug. 1 1927 mvamog I 0r 144/500 ATTORNEY PatentedNov. 12, 1929 EARL WILSON, OF STROUD, OKLAHOMA STUFFING 1301;

Application filed August 12, 1327. SerialiNo 212525.

My invention relates to stalling boxes and more particularly to a deviceof that character for use in connection with oil well pumps; theprincipal object of the invention being to provide a box or thischaracter which is self-lubricating and may serve a guide for the polishrod.

In accomplishing this object I have provided improved details ofstructure, the preierred forms of which are illustrated in theaccompanyin drawings, wherein F l is a perspective View of my improveddevice illustrating its application to the upper end of a string of welltubing and in connection with a pumping jack.

Fig. 2 is an enlarged, longitudinal section of the smiling box,illustrating portions oi the well tubing and polish rod.

Fig. 2.

Referring more in detail to the drawings:

1 designates the upper end of a well casing and 2 a casing head providedwith a gas vent pipe 3. Extending through the casing head r 2 is thewell tubing l provided with a T ii'tting having connection with alateralflow pipe line (5 and upon which is mounted a stuiiing box 7,constructed and arranged in accordance with my invention. 8 designates apump polish rod which extends through the stuiiing box and tubing to thepump at the bottom of the well and is operatively connected with a jack9 of ordinary construction and in accordance with common r practice.

lhe stuffing boX comprises a cup-shaped base 10 having a screw threadedneck 11 by which it is mounted on the upper end oi? the well casing, andprovided with an interior chamber 12 open at the bottom for communication with the Well tubing. A channel 13 extends from the neckchamber 12 through an exterior port 14 to commumcatmn with the basechamber 15 through an interior boss 16, and an interior nipple 17carried by the boss 16. On the nipple 17 is mounted a back check valve18 of any suitable construction for controlling i'low of lubricant fromthe well tubing through the neck chamber and channel 13 to the chamberof the stuihng box.

as a guide for the polish rod 8.

Fig. 3 is a cross section on the line 33 of I with the polish rod.

Formed integral with an extending centrally into the base cup 10 is agland 19, adapted for serving the ordinary packing purpose, as willpresently be described, and

The upper portion of the base cup is e2;-

teriorly screw threaded as at 20 and adj ustably mounted on the cup is acoverQl having an inwardly directed, integral gland 22 aligning with thegland '19 on the cup base. so

23 designates an intermediate guide and bearing member having stufiingboxes 24 at its respective ends co-operative with the glands l9 and 22for compressing the packing 25. within the boxes when the cover .mem-(:5 her is threaded onto the base. The inter mediate member is providedwith lateral ports 26 through which lubricant contained with the cupchamber may pass to contact '10 Assuming the parts to be constructed andassembled as described, with the stuffing box mounted on the upper endof the well tubing as shown, when the pump is operated the rod isreciprocated in the stulling box and i oil elevated from the well in theusual manner, the major portion of the oil flowing oil through thelateral line 6, but a part or it accumulating within the neck chamber 12and passing through the channel 18 and so check valve 18 into the cupchamber. lVhen the chamber is filled to or above the level of thelateral ports 26, oil may pass through said ports to the polish rod,thereby maintaining the rod under proper lubrication at so all timeswhen the pump is in operation. It is apparent that the stuffing box maybe adjusted by manipulation of the cover member on the base and that theflange and bearing members serve as an effectual guide on for the polishrod.

,l/Vhat I claimand desire to secureby Letters Patent is:

1. A device of the character described including a cup-shaped base and acover adjustable on the base, thebase and cover each having an inwardlydirected gland, and an intermediate bearing member having packing boxesat its ends cooperative with the respective glands.

2. In combination with well tubing and a polish rod, a cup having achambered neck attached to the tubing, an inwardly directed gland forthe rod, and a channel leading from the neck chamber to the cup chamber,a cover adjustable onthe cup having a gland directed toward and aligningwith the cup gland, an intermediate bearing having stuffing boxes forthe glands and lateral ports for supplying lubricant to the rod, and aback check valve controlling flow from the neck chamber to the cupchamber.

3. A device of the character described, including a cup-shaped basehaving an exte ior chambered neck, and having a gland and a channelledboss extended into the interior ofthe base, an adjustable cap for thebase havin a 'land' ali nin with the base a a c: c 1 gland, a bearin gmember in the cup chamber having packing boxes co-operative with saidglands and having lateral ports for admitting lubricant'from the basechamber to said packing, and a back check valve mounted on said base andcontrolling flow from the neck chamber to the cup chamber.

In testimony whereof I afiiz-z my signature.

EARL WILSON.

